The oldest Kardashian sister was out to turn heads Saturday night at the Women's Health Hamptons "Party Under The Stars" event in New York, where she sported a tight-fitting, plunging white Made for Pearl lace romper.

Kourtney was accompanied by boyfriend Scott Disick, 31, at the event, which benefitted the RUN10 FEED10 campaign. She's currently pregnant with their third child, who will join their son Mason, 5, and daughter Penelope, 2.

But though Kourtney and Scott certainly seemed in good spirits Saturday night, that wasn't the case on the most recent episode of Keeping Up with the Kardashians, which featured Kim Kardashian stepping in to control a sloppy drunk Disick.